MegaMacs offers the used Apple iMac Intel Core 2 Duo 2.16GHz 24″ Desktop, model no. MA456LL/A, for $599.99 plus around $25 for shipping. That’s a $6 drop from our mention two weeks ago and the lowest total price we could find for a used system with the same configuration by $286. Features include an Intel Core 2 Duo T7400 2.16GHz dual-core processor, 24″ 1920×1200 widescreen LCD, 2GB RAM, 250GB hard drive, dual-layer DVD burner, 802.11n wireless, Bluetooth, iSight webcam, and more.

A 30-day MegaMacs warranty applies. Also, an OS is installed on this system, but it’s unclear which OS it is.